Belt-pulley.



No. 857,305. PATENTED JUNE 18, 1907. G RICHARDS BELT PULLEY. APPLICATIONFILED MAY 1.1906.

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G. RICHARDS. BELT PULLEY.

APPLICATION FILED MAY 1,1906.

PATENTED JUNE 18, 190?.

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. ATTORNEYS.

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GEORGE RICHARDS, OF PHILADELPHIA, PENNSYLVANIA.

BELT-PULLEY.

Specification of Letters Patent.

Patented June 18, 1907.

Original application filed August 9, 1905, $erial No. 273,498. Dividedand this application filed May 1, 1906. $eria1 314,633-

To all whom it may concern:

Be it known that I, GEORGE RICHARDS, a citizen of the United States,residing at Philadelphia, county of Philadelphia, and State ofPennsylvania, have invented a new and useful Improvement inBelt-Pulleys, of which the following is a full, clear, and exactdescription, reference being had to the accompanyingdrawings, which forma part of this specification.

This application is a division of an application filed by me August 9,1905, Serial No.

The invention forming the subject matter of this application relatesmore particularly to that type of composite metal belt pulley known as asplit pulley, and especially a pulley which consists of two alining hubsor hub sections, made of steel castings, a series of pairs of arms madefrom rolled bars of channel section, the two arms of each pair beingsecured, at their inner ends, to the two hub-sections respectively, andat their outer ends bent oppositely parallel with the pulleyaxis; and arim, bent to a circular shape, to which the outer ends of the arms areattached. The hub sections are each made in two halves, bolted together,and the rim is also made in two halves that are removably clampedtogether at the two joints.

The object of the invention is to provide a simple and reliable means ofsecuring the arms to the rim at the joints between the abutting ends ofthe rim sections.

The invention consists of common securing means, hereinafter described,for holding together the abutting ends of the curved plates of which therim is formed and for attaching the arms to the rim at such abuttingends.

In the drawings: Figure 1 is a side elevation of a split pulleyembodying my invention. Fig. 2 is a transverse section through thepulley on the line 2-2 of Fig. 1. Fig. 3 is an enlarged detail sectionalview taken on the line 33 of Fig. 4 transversely through a part of thepulley and showing the rim, arms, and securing means. Fig. 4 is anenlarged detail sectional view of the parts illustrated in Fig. 3, thesection being taken at right angles to that of Fig. 3. Fig. 5 is anenlarged detail sectional view taken on the line 5-5 of Fig. i Fig. 6 isa plan view of the clipand ends of the arms as seen if the rim wereremoved. Fig. 7 is a sectional view similar to Fig. 5 showing a widerrim and the auxiliary clips employed in connection therewith. Fig. 8 isa sectional view taken at right angles to that of Fig 7. Fig. 9 is atransverse sectional view of one of the auxiliary clips.

When a' pulley is made in halves, or split, to enable the pulley to beplaced on the shaft without disconnecting the ends of the shafts, it isnecessary, especially with a pulley of a size not easily handled, toprovide means whereby, quickly and conveniently, the ends of the rimsmay be pulled together and firmly attached to the arms, so that the endsof the two rim sections may properly abut and aline. For many practicalreasons, it is desirable that the rim should be supported at the jointsand not between the joints as is generally the practice. The hubsections u, u, are made in two pieces bolted together as shown in Fig.2-.

c, c, are the pulley arms, each pair of arms being held together nearthe rim by means of the rivet d. The bent outer ends of the arms aresecured to the end a of one rim section by means of a row of bolts 6, onone side of the joint m.

f is a metal clip having side members attached to the end I) of theother rim section by means of rivets h. The side members of and thusprevent any outward movement of the rim section to which the clips aresecured. The clip f has a hole through it through which extends the bolt9. The bolt 9 is pivoted on the rivet (Z. By drawing up the nuts 0 theend I) of the rim section to which the clips are secured is broughtfirmly against the end a of the other rim section and also over the arms0, and the projections n are drawn tightly under the arms 0. The arms 0to which one rim section is secured are thus confined between the otherrim section and the clip secured thereto. The construction is oneadmirably adapted to resist the centrifugal and driving strains to whichthe rim is subjected when in use. With split pulleys having wide rims,additional clips are provided to hold the ends of the rim sections tothe arms, and such clips are shown in Figs. 7, 8 and 9. Theseclips & aresecuredto the end I) of one of the rim sections by means of boltsriveted to the rim section and extending throughholes in the clips.

p are projections having inclined faces extending under the adjacentflanges of the arms 0. By tightening the bolts 9',- which draw the clips'i to the rim section, the projections p will at the same time draw theends of the rim sections together, thus firmly locking the ends of therim sections at the joint m. In wide pulleys, two or more clips i, asmay be required, are used on each side of the pulley, in connection withthe central clip f. In mounting the split pulley on its shaft, the rimsections are first drawn together by the bolts g. After the rim sectionsare in position, the clips'i are put on and bolted up tightly. I

Having now fully described my invention, what I claim and desire toprotect by Letters Patent is:

1. In a composite belt pulley, the combination with the hub, of a rimhaving a joint, pairs of arms extending from the hub, the

' outer ends of each pair being bent away from each other toward thepulley edges and underlying and supporting the rim, a pair of said armsextending approximately beneath said joint and secured to the rim on oneside of said joint, a clip secured to the rim on the other side of saidjoint, and a bolt pivoted to said pair of arms and engaging said clip.

2. In a composite belt pulley, the combination with the hub, of a rimhaving a joint, pairs of arms extending from the hub, the outer ends ofeach pair being bent away from each other toward the pulley edges andunderlying and supporting the rim, a pair of said arms extendingapproximatelybeneath said joint and secured to the rim on one side ofsaid joint, a clip secured to the rim on the other side of said joint,and a bolt pivoted to said pair of arms and engaging said clip, projection's on the clip underlying respectively the two arms of a pair.

3. In a composite belt pulley, the combination with the hub, of a rimhaving a oint, pairs of arms extending from the hub, the outer ends ofeach pair being bent away from each other toward the pulley edges andunderlying and supporting the rim, a pair of said arms extendlngapproximately beneath said joint and secured to the rim on one side ofsaid joint, a clip secured to the rim on the other side of said joint, arivet by which the two arms of a pair are secured together atapproximately the point at which the outer ends of the arms diverge, anda bolt pivoted on said rivet and extending through said clip.

4. In a composite belt pulley, the combination with the hub, of a rimhaving a joint, pairs of arms extending from the hub, the outer ends ofeach pair being bent away from each other toward the pulley edges andunderlying and supporting the rim, a pair of said arms extendingapproximately beneath said joint and secured to the rim on one side ofsaid joint, a centralclip and outside clips secured to the rim on theother side of said joint, the central clip engaging said pairs of arms,and the outside clips engaging respectively the two arms of said pair.

5. In a composite belt pulley, the combination with the hub, of a rimhaving a joint, pairs of arms extending from the hub, the outer ends ofeach pair being bent away from each other toward the pulley edges andunderlying and supporting the rim, a pair of said arms extendingapproximately beneath said joint and secured to the rim on one side ofsaid joint, a central clip and outside clips secured to the rim on theother side of said joint, and means by which said arms and oh s may bedrawn together, thereby enabling the opposing rim ends to be tightlyabutted at the joint.

6. In a composite belt pulley, the combination with the hub, of a rimhaving a joint, pairs of arms extending from the hub, the outer ends ofeach pair being bent away from each other toward the pulley edges andunderlying and supporting the rim, a pair of said arms extendingapproximately beneath said joint and secured to the rim on one side ofsaid joint, a central clip and outside clips secured to the rim on theother side of sald joint, projections on the central clip underlyingrespectively the two arms of a pair, and projections on the outsideclips underlying respectively the said two arms.

7. In a composite belt pulley, the combination with the hub, of a rimhaving a oint, pairs of arms extending from the hub, the outer ends ofeach pair being bent away from each other toward the pulley edges andunderlying and supporting the rim, a pair of said arms extendingapproximately beneath said joint and secured to the rim on one side.

of said joint, a central clip and outside clips secured to the rim onthe other side of sald joint, projections on the central clip underlyingrespectively the t'wo arms of a pair, projections on the outside clipsunderlying respectively said two arms, and means by which said arms andclips may be drawn together.

8. In a composite belt pulley, the combination with the hub, of a rimhaving a joint, pairs of arms extending from the hub, the outer ends ofeach pair being bent away from each other toward the pulley edges andunderlying and supporting the rim, a pair of said arms extendingapproximately beneath said joint and secured to the rim on one side ofsaid oint, a central clip secured to the rim on the other side of saidjoint, projections on the central clip underlying respectively the twoarms of a pair, outside clips, projections on the outside clips havingupwardly inclined faces underlying respectively said two arms, a boltengaging said pair of arms and said central clip, and means to supporteach outside clip on the rim and to draw said clip toward the rim.

9. In a composite belt pulley, the combination with the hub, of a rimhaving a joint, arms extending from the hub, Whose outer ends are bentoutwardly toward the rim edge and underlie and support the rim, one ofsaid arms extending approximately beneath said joint and secured to therim on one side of said joint, a clip, a bolt engaging the clip and therim on the other side of said joint and inclined face engaging the innerside of said 15 arm.

In testimony of which invention, I have hereunto set my handat London,on this 12 day of April, 1906.

GEORGE RICHARDS.

Witnesses:

ALFRED NUTTING, C. P. LIDDoN.

